Where are glow plugs located on focus 1.6 tdci?

On a Ford Focus 1.6 TDCi, glow plugs are located in the cylinder head, directly above the combustion chambers. To access them, you typically need to remove the engine cover and possibly some other components, such as the intake manifold, depending on the model year and specific engine layout. It's important to ensure the engine is cool before attempting to access the glow plugs.